Question

Resolva as equações

a) z-18=-1\2

b)0,3b+2=-10

c)1/2=3+a/4+2a

Answer 1

a) z-18= -1   ==> 2z - 36 = -1 ==> 2z = - 1+36 ==> 2z=35 ==> z = 35/2
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b)0,3b+2=-10 ==> 0,3b = - 10-2 ==> 0,3b = - 12 ==> b= 12/0,3 =>b= 40 
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c)1=3+a+2a ==> 2 = 3+a+8a==> 9a = 2-3 ==> 9a = -1 ==> a = -1/9
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